High-Efficiency, 3A, Current-Mode Synchronous, Step-Down Switching Regulator

Smallest 3A Solution Saves Board Space While Offering Excellent Efficiency
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Create a design and simulate using EE-Sim: [MAX15058]

The MAX15058 high-efficiency, current-mode, synchronous step-down switching regulator with integrated power switches delivers up to 3A of output current. The device operates from 2.7V to 5.5V and provides an output voltage from 0.6V up to 94% of the input voltage, making the device ideal for distributed power systems, portable devices, and preregulation applications.

The MAX15058 utilizes a current-mode control architecture with a high-gain transconductance error amplifier. The current-mode control architecture facilitates easy compensation design and ensures cycle-by-cycle current limit with fast response to line and load transients.

The MAX15058 offers selectable skip-mode functionality to reduce current consumption and achieve a higher efficiency at light output load. The low RDS(ON) integrated switches ensure high efficiency at heavy loads while minimizing critical inductances, making the layout design a much simpler task with respect to discrete solutions. Utilizing a simple layout and footprint assures first-pass success in new designs.

The MAX15058 features a 1MHz, factory-trimmed, fixed-frequency PWM mode operation. The high switching frequency, along with the PWM current-mode architecture, allows for a compact, all-ceramic capacitor design.

The MAX15058 offers a capacitor-programmable soft-start reducing inrush current, startup into PREBIAS operations, and a PGOOD open-drain output that can be used as an interrupt and for power sequencing.

The MAX15058 is available in a 9-bump (3 x 3 array), 1.5mm x 1.5mm WLP package and is specified over the -40°C to +85°C temperature range.

Data Sheet

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An evaluation board is available: MAX15058EVKIT

Key Features

  • Internal 30mΩ (typ) RDS(ON) High-Side and 18mΩ (typ) Low-Side MOSFETs at 5V
  • Continuous 3A Output Current Over Temperature
  • 95% Efficiency with 3.3V Output at 3A
  • 1% Output Voltage Accuracy Over Load, Line, and Temperature
  • Operates from 2.7V to 5.5V Supply
  • Cycle-by-Cycle Overcurrent Protection
  • Adjustable Output from 0.6V to Up to 0.94 x VIN
  • Programmable Soft-Start
  • Factory-Trimmed, 1MHz Switching Frequency
  • Stable with Low-ESR Ceramic Output Capacitors
  • Safe-Startup Into Prebiased Output
  • External Reference Input
  • Skip-Mode Functionality
  • Enable Input/Power-Good Output
  • Fully Protected Against Overcurrent and Overtemperature
  • Input Undervoltage Lockout


  • Distributed Power Systems
  • IP Phones
  • Notebook Power
  • Portable Devices
  • Preregulators for Linear Regulators
  • Server Power

Key Specifications:

Step-Down Switching Regulators
Part Number VIN
Output Adjust. Method IOUT1 (max)
Switch Type Synchronous Switching Power Good Signal DC-DC Outputs Oper. Freq.
Design Tools Budgetary
min max min max See Notes
MAX15058  2.7 5.5 0.6 5
Dyn. REF In
3 Internal Yes Yes 1 1000 EE-Sim $3.86 @1k
See All Step-Down Switching Regulators (310)

Pricing Notes:

This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


MAX15058: Typical Operating Circuit
Typical Operating Circuit

More Information

Topmark Coding MAX15058
New Product Press Release   2012-03-22 ]

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Information Index

Document Ref.: 19-5478 Rev 2; 2011-07-14
This page last modified: 2011-07-14